Bullhead City, AZ 89029 Frost Dates
Frost dates for Bullhead City, AZ, ZIP 89029
The last spring frost here typically falls around 01/04, about 129 days from today. The first fall frost typically arrives around 12/23, about 356 frost-free days later.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Bullhead City, not a forecast for this year.
What to do before the first frost
Zone 9b around Bullhead City has about 17 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
01/04 is the middle of 30 years of NOAA records, not a promise. Plant by 02/05 and you're betting against frost in roughly 9 years out of 10. 12/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bullhead City compares
At roughly 356 frost-free days, Bullhead City places 2,110 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 34 of 506.
Learn more
the frost range explains how to read the range around Bullhead City's dates instead of trusting one, and local microclimates explains what one yard in Bullhead City can differ from the 89029 normal.